3DPrinting

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[Resin Printing] Any tests for finding the minimum lift height? (self.3dprinting)

submitted 1 week ago by papalonian to c/3dprinting

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Something I've noticed when watching my resin printer work is that a lot of time is spent every later lifting the plate well after I hear the model unstick from the FEP.

It's not a huge deal on smaller prints, especially ones that can be printed with "vroom" settings, but on larger models that are being printed at 1-2mm/s lift speed, several hours are spent just waving the model in the air for no reason...

I had the idea of making a test model that is essentially an intentional suction cup in the center of the plate (where FEP stretch is most prominent and required lift distance should be highest). I would print this model multiple times, with slightly lower lift heights each iteration, until it fails to release from the FEP. I'd add a safety margin and set my raise height to that...

Does anyone see any fault in my logic, or know of a better method of achieving what I'm after?

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[–] papalonian 1 points 1 week ago

Time saved vs used is a pretty good argument against.

My previous printer (Anycubic Mono 6k) allowed you to change lift height and speed on the printer during a print, so I could just lower it until just above hearing the separation. My current printer (Saturn 3) doesn't have this capability, so it would have to be multiple prints, which would take a couple hours.

What might be a better solution, is to do a similar test, again with "worst case scenario" (ie a cup with no suction cup release hole, or a very small one), increase the result by a large margin of error, and go with that until I need to replace the FEP or prints start failing.